The cameraman who shoots many of the amazing scenes you see on "Shark Week" shares the DIY equipment he uses in the field.

Rover Cam

Rover Cam

Built on the chassis of a Traxxas 4x4 (about $400), this rig uses its fat, nobby tires to crawl over rough terrain to get closeups of lions, hyenas, and other predators feasting on a kill. One of three cameras sits in a takeout sushi box covered in camo duct tape and reinforced with bungee cords. "It's not really much of an invention, if you ask me," Casagrande says. "But it gets the job done!"